Question

The numerical value of the atmospheric pressure on the surface of the earth in pascal is
A. \[1.013\times {{10}^{5}}pascal\]
B. 10 bar
C. 1.10325
D. None

Answer 1

Hint: Atmospheric pressure is the weight of the atmosphere or air at any given surface. Since the amount of air above a surface would vary with the height of the surface a standard height is taken as the atmospheric pressure on the surface of the earth it is the air pressure on the earth surface at the sea level. That standard pressure on earth is called 1 atm. And its conversion has been given in the formula.

Formula used:
\[1atm=1.013\times {{10}^{5}}pascal\]

Complete answer:
Atmospheric pressure or the barometric pressure is the pressure encountered within the atmosphere of Earth. It is sometimes also called the air pressure as it is the weight of the air above any given surface. The pressure on the surface of the earth, at sea level, is called 1 atmosphere or 1 atm. It is also known that conversion between the different scales of pressure is possible. We know that, \[1atm=1.013\times {{10}^{5}}pascal\]
So, the numerical value of the atmospheric pressure on the surface of the earth in pascal is \[1.013\times {{10}^{5}}pascal\]

So, the correct answer is “Option A”.

Note:
Pressure has varied applications in physics as well as chemistry and to fit those various needs it is expressed in many terms. It is important to remember the conversions among the different pressure units. The most important ones are:
1 atm = 760 mmHg
101.3 kPa = 760 mmHg
1 atm = 1.01325 bar
1 atm = 760 torr
1 atm = 14.6959 psi
1 bar = 750.062 torr